<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Gets the highest available hash ID</title>
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-base.css" />
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-medium.css" />

 </head>
 <body class="docs"><div class="navbar navbar-fixed-top">
  <div class="navbar-inner clearfix">
    <ul class="nav" style="width: 100%">
      <li style="float: left;"><a href="ref.mhash.html">« Mhash 函数</a></li>
      <li style="float: right;"><a href="function.mhash-get-block-size.html">mhash_get_block_size »</a></li>
    </ul>
  </div>
</div>
<div id="breadcrumbs" class="clearfix">
  <ul class="breadcrumbs-container">
    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="ref.mhash.html">Mhash 函数</a></li>
    <li>Gets the highest available hash ID</li>
  </ul>
</div>
<div id="layout">
  <div id="layout-content"><div id="function.mhash-count" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mhash_count</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">mhash_count</span> &mdash; <span class="dc-title">Gets the highest available hash ID</span></p>

 </div>

 <div id="function.mhash-count-refsynopsisdiv">
  <div class="warning"><strong class="warning">警告</strong><p class="simpara">此函数自 PHP 8.1.0 
起<em class="emphasis">弃用</em>。强烈建议不要应用此函数。</p></div>
 </div>
 
 <div class="refsect1 description" id="refsect1-function.mhash-count-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>mhash_count</strong></span>(): <span class="type">int</span></div>

  <p class="para rdfs-comment">
   Gets the highest available hash ID.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.mhash-count-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.mhash-count-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the highest available hash ID. Hashes are numbered from 0 to this
   hash ID.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.mhash-count-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>8.1.0</td>
       <td>
        This function has been deprecated.
        Use the <a href="ref.hash.html" class="link"><code class="literal">hash_*()</code> functions</a> instead.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.mhash-count-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-922">
    <p><strong>示例 #1 Traversing all hashes</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$nr&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mhash_count</span><span style="color: #007700">();<br /><br />for&nbsp;(</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">&lt;=&nbsp;</span><span style="color: #0000BB">$nr</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">++)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">sprintf</span><span style="color: #007700">(</span><span style="color: #DD0000">"The&nbsp;blocksize&nbsp;of&nbsp;%s&nbsp;is&nbsp;%d\n"</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">mhash_get_hash_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$i</span><span style="color: #007700">),<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">mhash_get_block_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$i</span><span style="color: #007700">));<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>

</div></div></div></body></html>